So i just completed changing my spark plugs and to my surprise, my CEL came on after i fired her up. Also, she started to shake a lot more than ususal and it seemed like it was misfiring. So I went back under the hood to re-check my work and low and behold, i forgot to put on one of the wire harnesses! So i plugged it back in and now the shaking is gone but my CEL is still on.
Here are my concerns:
Did i do any major damage?
Can i reset my CEL myself?
Do i need to take it to the dealership to reset it or get my engine retuned?
Thanks in advance!